Finding the Fourth Proportional to 2,308.10, 3,460.01 and 921.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.10 : 3,460.01 = 921.09 : x
2. Step 2: Convert to fraction form
   2,308.10/3,460.01 = 921.09/x
3. Step 3: Cross multiply
   2,308.10x = 3,460.01 × 921.09
4. Step 4: Simplify right side
   2,308.10x = 3,186,976.01
5. Step 5: Solve for x
   x = 3,186,976.01/2,308.10
6. Step 6: Final answer
   x = 1,380.78